import express from "express";
import { guildMap, wait } from "../common.js";
import { dangerousAdminMode } from "../config.js";
import { checkAuth, createToken } from "../tokens.js";

const router = express();

router.get("/", (req, res) => {
    res.status(200).send({ error: false, message: "SUCCESS_API_OK" });
});

router.post("/tokens/create", async (req, res) => {
    if (!dangerousAdminMode)
        return res.status(403).send({ error: true, message: "ERROR_FEATURE_DISABLED" });

    const { username, avatarURL, discordID, guildAccess } = req.body;
    if (!username || !discordID || !guildAccess)
        return res.status(400).send({ error: true, message: "ERROR_BAD_REQUEST" });

    try {
        const token = await createToken({ username, avatarURL, discordID, guildAccess });
        res.status(200).send({ error: false, message: "SUCCESS_TOKEN_CREATED", token });
    } catch(e) {
        res.status(500).send({ error: true, message: "ERROR_TOKEN_CREATE_FAILURE" });
    }
});

router.get("/users/@self", checkAuth(async (req, res) => {
    res.status(200).send({ error: false, user: {
        username: req.user.username,
        avatarURL: req.user.avatarURL,
        discordID: req.user.discordID,
        guildAccess: req.user.guildAccess
    }});
}));

router.post("/guilds/:guildId/channels/:channelId/messages/create", checkAuth(async (req, res) => {
    const messageContent = req.body.content;
    if (!messageContent)
        return res.status(400).send({ error: true, message: "ERROR_NO_MESSAGE_CONTENT" });

    const guildId = req.params.guildId;
    if (!guildId)
        return res.status(400).send({ error: true, message: "ERROR_NO_GUILD_ID" });

    const channelId = req.params.channelId;
    if (!channelId)
        return res.status(400).send({ error: true, message: "ERROR_NO_CHANNEL_ID" });


    const { username, avatarURL, guildAccess } = req.user;

    if (guildAccess.indexOf(guildId) === -1)
        return res.status(403).send({ error: true, message: "ERROR_NO_GUILD_ACCESS" });

    const guild = guildMap.get(guildId);
    try {
        await guild.discordSendMessage(messageContent, channelId, username, avatarURL);
        res.status(201).send({ error: false });
    } catch(e) {
        console.error("server main: api: message create: error: ", e);
        res.status(500).send({ error: true, message: "ERROR_MESSAGE_SEND_FAILURE" });
    }
}));

router.get("/guilds/:guildId/channels", checkAuth(async (req, res) => {
    const guildId = req.params.guildId;
    if (!guildId)
        return res.status(400).send({ error: true, message: "ERROR_NO_GUILD_ID" });

    const { guildAccess } = req.user;

    if (guildAccess.indexOf(guildId) === -1)
        return res.status(403).send({ error: true, message: "ERROR_NO_GUILD_ACCESS" });

    const guild = guildMap.get(guildId);
    try {
        res.status(200).send({ error: false, channels: guild.userFacingChannelList() });
    } catch(e) {
        console.error("server main: api: guild get channels: error: ", e);
        res.status(500).send({ error: true, message: "ERROR_CHANNELS_FETCH_FAILURE" });
    }
}));

router.get("/guilds/:guildId", checkAuth(async (req, res) => {
    const guildId = req.params.guildId;
    if (!guildId)
        return res.status(400).send({ error: true, message: "ERROR_NO_GUILD_ID" });

    const { guildAccess } = req.user;

    if (guildAccess.indexOf(guildId) === -1)
        return res.status(403).send({ error: true, message: "ERROR_NO_GUILD_ACCESS" });

    const guild = guildMap.get(guildId);
    try {
        res.status(200).send({ error: false, guild: guild.guildObject });
    } catch(e) {
        console.error("server main: api: guild get info: error: ", e);
        res.status(500).send({ error: true, message: "ERROR_GUILD_INFO_FETCH_FAILURE" });
    }
}));

router.get("/users/@self/guilds", checkAuth(async (req, res) => {
    const { guildAccess } = req.user;

    res.status(200).send({ error: false, guilds: guildAccess.map(e => guildMap.get(e).guildObject) });
}));

router.get("/guilds/:guildId/events/poll", checkAuth(async (req, res) => {
    const guildId = req.params.guildId;
    if (!guildId)
        return res.status(400).send({ error: true, message: "ERROR_NO_GUILD_ID" });

    const { guildAccess } = req.user;

    if (guildAccess.indexOf(guildId) === -1)
        return res.status(403).send({ error: true, message: "ERROR_NO_GUILD_ACCESS" });

    const guild = guildMap.get(guildId);
    try {
        guild.holdForEvent(15000)
            .then(result => res.status(200).send({ error: false, event: result }));
    } catch(e) {
        console.error("server main: api: guild poll events: error: ", e);
        res.status(500).send({ error: true, message: "ERROR_POLL_FAILURE" });
    }
}));

router.get("/events/poll", checkAuth(async (req, res) => {
    const { guildAccess } = req.user;

    try {
        // note: probably not very optimal
        const promises = [];
        guildAccess.forEach((guildId) => {
            const guild = guildMap.get(guildId);
            if (guild) {
                promises.push(guild.holdForEvent(15000));
            }
        });

        // note: if 2 guild events happen at the same time, one of them may be dropped
        Promise.race(promises)
            .then(e => {
                res.status(200).send({ error: false, event: e })
            });
    } catch(e) {
        console.error("server main: api: guild poll events: error: ", e);
        res.status(500).send({ error: true, message: "ERROR_POLL_FAILURE" });
    }
}));

export default router;